/Engine/Source/Developer/BSPUtils/Public/BSPOps.h
Adds a brush to the list of CSG brushes in the level, using a CSG operation.
A newly-created copy of the brush.
static [ABrush](API\Runtime\Engine\Engine\ABrush) * csgAddOperation ( [ABrush](API\Runtime\Engine\Engine\ABrush) * Actor, uint32 PolyFlags, EBrushType BrushType )